Associated PressChip Kelly says it's hard to know much about who will be start at any and all positions until the Ducks can practice in full pads, which will happen for the first time Saturday.

EUGENE -- It might not have had the star-studded power of a practice at USC, but the Oregon sideline was dotted with celebrities on Wednesday as the Ducks continued their roll through fall camp.

Erik Spoelstra, the coach of the Miami Heat, and Tony Dungy, the former Indianapolis Colts coach who won the Super Bowl in 2007, both made appearances at practice, watching from the sidelines as the Ducks went through day No. 3 of no shells or pads.

"We talked about the 1-2-2 trap," joked Chip Kelly about Spoelstra's visit. "We're going to implement it in third down passing situations."

It turns out that Spoelstra, who prepped at Jesuit in Beaverton and then went on to be voted WCC Freshman of the Year at the University of Portland, had been hoping to stop by UO for awhile, and finally found the time to do it: Spoelstra, whose mother is from the Phillipines, was on his way back from a trip to the country and found time to swing by Eugene. Kelly said the two spent the day together, and would talk more after practice on Wednesday, trading tips and coaching stories.

"He got to the championship game, we got to the championship game and I don't think either of us liked the results," Kelly said. "We'll sit and visit a little more, but I think we both got a lot of pretty good ideas (from each other)."

Dungy, has been a regular at UO practice the last couple days as he watches his son, Eric, a redshirt freshman. Tony Dungy and his wife, Lauren, have a home in Eugene.

The Ducks will be in shells on Thursday and Friday before going to full pads on Saturday, their first day of doubles. Before then, Kelly said, it's hard to judge what's going on.

"I've seen a ton of guys shine without pads on and all the sudden the pads come out and guys you didn't notice (before) step up and guys you HAD noticed don't step up," Kelly said. "The next couple days will be telling."

It's supposed to get even hotter in the next few days, which players have said should prepare them for the heat and humidity they're expected to face in Dallas. There have been no dehydration issues to our knowledge, though the heat may be getting to offensive coordinator Mark Helfrich, who joked that he had already lost track of what day it was.

LaMichael James update: LaMichael James, the star running back who last season was a Heisman finalist, has been in and out of practice the last three days as he finishes up summer school classes. Though he has not been present for the entire practice, Kelly said James is fine in terms of NCAA compliance (athletes must participate in five full practices before they can suit up in pads), as is fellow running back Kenjon Barner, who has also had to finish up classes. "They're done now as far as I understand," Kelly said.